chacris99 chacris99
  • 03-02-2016
  • Mathematics
contestada

40% of what number is 5

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ryanwxu99
ryanwxu99 ryanwxu99
  • 04-02-2016
It would be 12 and 1/2 because 40% is 2 and 1/2 of 100 and then you do 5 times 2 and 1/2 and you get 12 and 1/2.
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Leader
Leader Leader
  • 04-02-2016
40% can be expressed as 40/100 or 0.4

[tex]\frac{40}{100} \times x = 5\\\\0.4 \times x = 5[/tex]

Divide both sides by 0.4 to isolate 'x'

[tex]0.4x = 5\\\\\frac{0.4x}{0.4} = \frac{5}{0.4}\\\\x = \frac{5}{0.4} \\\\\boxed{\bf{x = 12.5}}[/tex]

40% of 12.5 is 5.
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